Using your Jet 456620 AHJ - 20 bottle jack is quite simple. First, make sure the jack is on a stable and flat surface. Connect the air pump to a pneumatic source if you want to speed up the lifting. You can use it in upright, angled, or horizontal positions depending on your task. Just position it under the load and start the lifting process. When it comes to safety, always check the load capacity. This jack can handle up to 20 tons, so don't overload it. Also, ensure that the base is well - seated and stable. For maintenance, keep the jack clean and dry. The heavy - duty molded case that comes with it can protect the jack from normal wear and tear. If you notice any leaks or issues with the electric - welded bases and cylinders, stop using the jack immediately and get it checked. And remember, since it's not affected by extreme temperatures, you can use it in different environments, but still, try to store it in a moderate - temperature place when not in use.
